<template>
    <div class="goodsinfo-container">
        <!--给小球添加动画-->
        <transition
        @before-enter="beforeEnter"
        @enter="enter"
        @after-enter="afterEnter">
            <div class="ball" v-show="ballFlag" ref="ball"></div>
        </transition>

        <!--商品轮播图区域-->
        <div class="mui-card">
            <div class="mui-card-content">
                <div class="mui-card-content-inner">
                    <swiper :lunbotulist="lunbotu"></swiper>
                </div>
            </div>

            <!--商品购买区域-->
        <div class="mui-card">
            <div class="mui-card-header">{{goodsinfo.title}}</div>
            <div class="mui-card-content">
                <div class="mui-card-content-inner">
                    <p class="price">
                        市场价：￥<del>{{goodsinfo.market_price}}</del>&nbsp;&nbsp;销售价：<span class="now_price">￥{{goodsinfo.sell_price}}</span>
                    </p>
                    <p>购买数量：
                        <!--把父组件的方法传递给子组件-->
                        <numbox @getcount="getSelectedCount" :max="goodsinfo.stock_quantity"></numbox>
                    </p>
                    <p>
                        <mt-button type="primary" size="small">立即购买</mt-button>
                        <mt-button type="danger" size="small" @click="addToShopCar">加入购物车</mt-button>
                    </p>
                </div>
            </div>

        </div>
        <!--商品参数区域-->
        <div class="mui-card">
            <div class="mui-card-header">商品参数</div>
            <div class="mui-card-content">
                <div class="mui-card-content-inner">
                    <p>商品货号：{{goodsinfo.goods_no}}</p>
                    <p>库存情况：{{goodsinfo.stock_quantity}}</p>
                    <p>上架时间：{{goodsinfo.add_time}}</p>
                </div>
            </div>
            <div class="mui-card-footer">
                <mt-button type="primary" size="large" plain @click="goDesc(id)">图文介绍</mt-button>
                <mt-button type="danger" size="large" plain @click="goComment(id)">商品评论</mt-button>
            </div>
        </div>
        </div>
    </div>
</template>

<script>
    import swiper from '../subcomponents/swiper.vue'
    import numbox from '../subcomponents/goodsinfo_numbox.vue'
    export default {
        data(){
            return{
                id:this.$route.params.id,
                lunbotu:[],//存放轮播图
                goodsinfo:{},//存放商品详情
                ballFlag:false,//控制小球隐藏和显示的标识符
                selectdCount:1//设置用户选中的数量，默认选中一个



            }
        },
        created(){
            this.getLunbo()
            this.getGoodsInfo()
        },
        methods:{
            getLunbo(){
                this.$http.get('api/getthumimages/'+this.id).then(result=>{
                    if(result.body.status===0){
                        result.body.message.forEach(item=>{
                            item.img=item.src
                        })
                        this.lunbotu=result.body.message
                    }
                })
            },
            getGoodsInfo(){
                this.$http.get('api/goods/getinfo/'+this.id).then(result=>{
                    if(result.body.status===0){
                        this.goodsinfo=result.body.message[0];
                    }
                })
            },
            goDesc(id){
                //点击使用编程式导航，跳转图文介绍页面
                this.$router.push({name:'goodsdesc',params:{id}});
            },
            goComment(id){
                //点击跳转评论页面
                this.$router.push({name:'goodscomment',params:{id}})
            },
            beforeEnter(el){
                el.style.transform="translate(0,0)"
            },
            enter(el,done){

                //获取小球在页面中的位置
                const ballPosition=this.$refs.ball.getBoundingClientRect()
                const badgePosition=document.getElementById("badge").getBoundingClientRect()

                const xDist=badgePosition.left-ballPosition.left
                const yDist=badgePosition.top-ballPosition.top
                //产生动画效果
                el.offsetWidth;
                el.style.transform=`translate(${xDist}px,${yDist}px)`
                //跳动的效果cubic-bezier(.4,-0.3,1,.68)
                el.style.transition="all 0.5s cubic-bezier(.4,-0.3,1,.68)"
                console.log("enter"+this.ballFlag)
                done();


            },
            afterEnter(el){
                this.ballFlag=!this.ballFlag


            },
            addToShopCar(){

                //添加到购物车
                this.ballFlag=!this.ballFlag

                // {id：商品的id,count:商品的数量,price:商品的价格,selected:商品是否被选中}
                //拼接出一个要保存到store中car 里的商品信息对象
                var goodsinfo={
                    id:this.id,
                    count:this.selectdCount,
                    price:this.goodsinfo.sell_price,
                    selected:true
                }
                //调用store中的mutations来将商品添加到购物车
                this.$store.commit('addToCar',goodsinfo)


            },

            getSelectedCount(count){
                //当子组件把选中的数量传给父组件时，把选中的值保存到data上
                this.selectdCount=count

            }
        },
        components:{
            swiper,
            numbox
        }
    }
</script>

<style lang="scss" scoped>
.goodsinfo-container{
    background-color: #cccccc;
    overflow: hidden;
    .now_price{
        color: red;
        font-size: 16px;
        font-weight: bold;
    }
    .mui-card-footer{
        display: block;
        .mint-button{
            margin: 10px 0;
        }

    }
    .ball{
        width: 15px;
        height: 15px;
        border-radius: 50%;
        background-color: red;
        position: absolute;
        z-index: 99;
        top: 407px;
        left: 161px;
    }
}
</style>